Disable automatic replies

Hello all, I am trying to figure out how to disable automatic reply emails from being sent on updates or status change. I know this has been answered before, because I have used it, but I can not find the post now.

Ex.

John opens a ticket and receives an email about opening a ticket. When I update the ticket "Post a reply", I want to change the default option to be -Do not email reply-, instead of it automatically emailing a reply. I thought it was in tickets.php, but I cannot find it. It saves a set of having to select Do not reply from the drop down.

After updating to 1.10, we lost all of our customization and are trying to rebuild them.